The microstructures in the templates are replicated on the surfaces of large-sized polypropylene samples using microinjection-compression molding in one step.The surfaces molded via the two sieves with different meshes exhibit the dual-level microstructure
which consists of micro pyramids with high aspect ratio and micro ridges.The surfaces molded via four templates
which consist of the aforementioned two sieves stacked with punched plates with different hole diameters
exhibit the three-level microstructure.The three-level microstructure consists of the uniformly distributed micro columns and the aforementioned dual-level microstructures on the top surfaces of the micro columns.All the six surfaces have the static contact angles of above 150 (i.e.
exhibit superhydrophobicity) and the rolling angles of from 5.5 to more than 90 (i.e.
exhibit a wide range of manipulation for the adhesion).For the surface having small-diameter micro columns and a few micro pyramids and micro ridges on their top surfaces
the water droplet forms a global non-composite state
thus high adhesion appears (the petal effect).For the surface having small-diameter micro columns and a number of micro pyramids and micro ridges on their top surfaces
the water droplet forms a localized non-composite state
thus relatively high adhesion appears.For the surfaces having the dual-level microstructures or having large-diameter micro columns and a number of micro pyramids and micro ridges on their top surfaces
the water droplets form a global composite state
thus lower adhesion appears; especially
the surfaces having small-sized micro pyramids and narrower gaps between the micro pyramids exhibit low adhesion (the lotus-leaf effect).
DESIGN AND MANIPULATION OF MICROSTRUCTURES ON MICROINJECTION-COMPRESSION MOLDED SUPERHYDROPHOBIC SURFACES
Ultrasonic Assisted Preparation of Superhydrophobic Polypropylene with Flower-like Micro-/Nanostructure on Surfaces
Preparation of Silicone Modified Polyurethane/Nano-SiO2 Composite Superhydrophobic Coating
Hierarchical Structures and Mechanical Performances of Semicrystalline Polymer Parts Fabricated by Means of Fused Deposition Modeling
Related Author
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Related Institution
Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, School of Materials and Energy, Guangdong University of Technology
Acuway Molds Limited
Department of Polymer Science and Materials, Dalian University of Technology
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing Engineering Research Center of Application Technology for 3D Printing
CAS Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences